EP2388383A2 - Method and device for sealing and performing a water repellent treatment of porous sections of a structure - Google Patents

Abstract

The method for sealing and hydrophobizing of porous parts of a structure, comprises pressing a pumpable composition in the porous part of the structure, where the composition possesses water-displacing or -infiltrating properties in which the composition is intruded in a given amount into the porous part of the structure, and subsequently applying a coating on an inner side of the parts of the structure having an adhesion promoter, a compensation layer, roughcast, and plaster. The coating has layers of a slurry type seal coating. The composition is free from water and silicone oil. The method for sealing and hydrophobizing of porous parts of a structure, comprises pressing a pumpable composition in the porous part of the structure, where the composition possesses water-displacing or -infiltrating properties in which the composition is intruded in a given amount into the porous part of the structure, and subsequently applying a coating on an inner side of the parts of the structure having an adhesion promoter, a compensation layer, roughcast, and plaster. The coating has layers of a slurry type seal coating. The composition is free from water and silicone oil, and has a suspension containing particle of a synthetic resin in a liquid, where a liquid phase has a higher vapor pressure than the water and an alcohol. The synthetic resin is isolated by an evaporation of the liquid phase on a wall of pores or capillaries in the porous building material, and forms a non water-wettable film. The composition has a solution of the synthetic resin in a liquid solvent at room temperature, where the solvent has the higher vapor pressure than the water. The solvent is an organic solvent such as alcohol. The film of the capillary is constricted in the porous building materials so that a capillary transport is prevented by the water, and water vapor. The synthetic resin reacts with the building material for building a hydrophobic monolayer on the walls of the pores of the building material, where: pressing the composition and applying the coating are carried out by the section of the part of the structure, which is covered on its outer side of a ground to an area that is vertically arranged; pressing the pumpable composition is carried out in the porous part of the structure through holes, which is introduced into the porous part of the structure; and pressing the composition is carried with a flow rate of 50-100 ml/min at a pressure of not more than 8 bar. The holes are spaced apart around 25 cm. The area has height in a vertical direction of 45 cm. Two layers have two different slurry type seal coatings, where the layer of the slurry type seal coating is closed to upcoming water. An independent claim is included for a device for pressing a pumpable composition in a porous part of a structure.

Description

Field of the invention

The invention relates to a method for sealing and hydrophobing porous parts of a building. The invention further relates to a device, in particular for carrying out the method for sealing and hydrophobing of porous parts of a building.

In buildings, especially in embedded in the ground structure parts of porous mineral building materials, such as brick or concrete basement walls, there is often the problem that water from the environment of the building, in particular from the surrounding soil, penetrates into parts of the building and moistened. The cause may be rain and spray water that penetrates into the building part via a missing or defective base seal. Another cause is hygroscopic water absorption by salts in building parts. Also moisture can penetrate from the surrounding soil of the building part by a missing or defective outer seal in the building part. Finally, moisture can rise from below by capillary action of the pores in the building material due to a missing or defective horizontal barrier.

For the penetration of water into structural parts by the soil surrounding the structure, four so-called load cases are distinguished in the art. The first load case is soil moisture, that is capillary water bound in the ground. Soil moisture is always present as minimum stress. This least load case is only given if to a sufficient depth below the building body only non-cohesive soil is present so that surface and rainwater can seep to free groundwater level without exerting hydrostatic pressure on the seal of the building body. A similar load case is non-accumulating leachate. For a lasting stance the However, there must be a drainage system to drain the water.

Occasionally accumulating leachate occurs when leachate can not seep through cohesive soil fast enough to groundwater. Due to the backwater of the water, the water exerts a hydrostatic pressure on the structural waterproofing. External water is assumed if the design water level is not at least 30 cm below the bottom of the foundation of the structure, so the structure is constantly exposed to hydrostatic water pressure from the outside. Such a construction situation requires special sealing measures.

Ingress of moisture can impair the intended use of the structure if, for example in a basement room due to the moisture that has penetrated into the building, so high a humidity is created that the space is no longer usable for the intended storage purposes. Of course, this is especially true when water seeps into such a room. Furthermore, on the surface of the inner side of such a wall quickly form mold, which make such a room useless for reasons of health protection for the residence of people.

Finally, such moisture can affect the stability of the building and thus the stability of the building. This is especially true when the moisture load fluctuates cyclically. One reason for this may be that the water entering a structural part already contains dissolved salts, eg chlorides from road salt or nitrates from fertilizers, with which the surrounding soil is contaminated. If the penetrated water evaporates on the inside of the affected part of the building, the salt precipitates and remains on the surface or in the porous material of the building part. Over time, the component accumulates with salt. Due to the space requirement of the salt during crystallization, the porous building material is gradually ground down from the inside. However, the penetrated water also dissolves salts of a mineral building material, in particular eg mortar. These salts are also transported to the inside of the building part and crystallize on evaporation of the water.

Due to the enrichment of the building part with salts, especially in the area of its surfaces, the water absorption of the building part is accelerated by the hygroscopic properties of the salt, and thus the further salt transfer or -verlagerung. At uniform moisture load, this effect initially occurs only on the inside of the building part and makes e.g. first noticeable by loose or falling plaster or grout crumbling from joints. With fluctuating moisture load, e.g. with fluctuating groundwater level, occurs due to the interim drying of the structure part of this effect on both sides of the building part, which is not visible on a covered with soil outside and therefore remains undetected long, often until the occurrence of structural damage to the building due to the loss of Carrying capacity of the affected part of the building. Due to the increased amount of salt in the structural part and the increased water absorption due to the hygroscopic properties of the salts also increases the risk of mechanical damage to the structural part by frost.

As the inside of the parts of the structure, that side, e.g. a wall, which is exposed to the lower humidification by the ambient conditions.

The moisture or the water penetrated into the wall increases by the capillary action in porous building materials also on the level of the surrounding soil on, so that the adverse effects also occur in higher-lying parts of the building. The ingress of water usually takes place horizontally from the soil into the structural part through damage to the external seal, e.g. in a bitumen paint, or over the foundation as rising damp.

If the load situation to which a structure is exposed can still be taken into account during the erection by means of suitable sealing measures, the subsequent control of a moisture damage is much more difficult and therefore more expensive. Cause of the occurrence of subsequent damage to moisture can be insufficient in the construction of the structure or poorly executed seal, damage to the seal, for example, in subsequent construction or by subsidence, or by changes in load, eg by soil compaction or surface sealing in the vicinity of the structure by Changes in the groundwater level or hydraulic engineering measures in the wider environment of the structure.

State of the art

Basically, it is generally proposed in the art as the most appropriate solution to seal an affected structure with a subsequent external sealing. For this purpose, the building is exposed by excavation outside. Since usually already an old seal is present, various manufacturers offer specially adapted to mineral or bituminous substrates sets of coating materials for creating a new outer seal on the found substrates.

The DE 40 31 745 C2 describes a method for sealing porous surfaces against water. The subject of the invention described in this patent is the use of a special polymer / bitumen emulsion. The field of application is the vertical external sealing of basement walls, etc., the horizontal sealing of concrete slabs and intermediate seals against rising damp and in wet rooms.

The DE 41 27 351 C2 also relates to a method of sealing porous construction surfaces against water. As a special feature of the invention, the application of a specific layer sequence of an aqueous alkaline silicon-containing primer, a cement-mineral intermediate layer and a polymer dispersion-modified cementitious mineral coating is specified. As a field of application is in particular the Neubauabdichtung of basement outer walls, the horizontal sealing of concrete slabs and the subsequent basement seal from the inside indicated.

The DE 101 63 133 A1 describes a method for producing a building waterproofing, in particular for walls in the Grundmauerbereich. As a special feature of the invention, the arrangement of a watertight and water vapor permeable protective sheet between two layers of a thick coating or attachment of the protective sheet is given on the thick coating. As a field of application to be sealed vertical walls are given, but also horizontal floors or sloping walls, also the use of resin plasters in the facade area.

In the DE 100 30 595 A1 , which has already been mentioned in the aforementioned document, a method for the subsequent horizontal and vertical sealing of buildings against pressurized water is described. However, an all-round watertight enclosure construction is to be introduced into the ground around the building.

Difficult is a subsequent sealing measure, if the outer walls of a building can not be exposed, for example, if the pad, for example. is overbuilt with outbuildings, extensions or traffic routes.

For such cases, there is practically only the possibility of making a subsequent seal from the inside of the building. For this purpose, various highly different methods and procedures are proposed in the prior art. These can be divided into two groups: on the one hand the injection of substances into the building wall (impregnation), and on the other hand the application of a dense coating on the inside of the building wall.

For the impregnation of masonry various substances are proposed, which are generally to be introduced by injectors in the masonry. These impregnations are usually used to form Horizontal barriers used in masonry against rising damp. Silicone microemulsions coming into use consist of relatively thick silicone resins or their solution in an organic solvent which is dispersed (emulsified) in water by means of an emulsifier in the form of small drops. The viscous stem emulsion can be thinned with tap water to the use concentration and injected into the masonry. The emulsion droplets are so large that they can be filtered out of the use dilution by so-called microfilters (membrane filters) whose pore size is in the range of brick, sand-lime brick and similar building materials. The aqueous microemulsion is further diluted by the pore water and shows practically the same capillary transport behavior as the pore water, so it is transported with the flow of rising water from the planned exclusion zone, distributed to other wall areas and thus largely diluted.

So-called silification barriers are produced by dilute aqueous water glass solutions (about 5% water glass + 95% water). Water glass is chemically unstable. The solution solidifies by low acidity (in the wall by the air carbonic acid) to an aqueous gel, which should clog the pores. This type of barrier was developed to stop water ingress in tunneling and mining. Like all aqueous products, silicifications also have the natural distribution problems in the wet wall. Therefore, a hole spacing of 10-15 cm is required. In addition, silification barriers are not durable (only 2-3 years) and generate in the wall by the inclusion of water (gel with 95% water content) thermal bridges, which drain the room heat almost unhindered to the outside.

Aqueous gel barriers have been developed to stop water leaks in tunneling and mining. They are based on gel-forming plastics - usually acrylates - and do not create any damaging salts in the masonry, but also only seal by the inclusion of water in the pores. Again, the sealing effect is created by clogging the pores with an aqueous gel (about 90% water in the gel).

The DE 101 30 091 A1 describes an injection cream for waterproofing masonry. A special feature is the composition of the injection cream in the form of a water-in-oil emulsion with a ratio of water phase to oil phase of 20 to 80 specified. Furthermore, a method for producing the injection cream is described as well as the use of the injection cream for draining or dry maintenance of masonry. The creamy consistency is given as a particular advantage, which should be possible almost horizontal holes in a masonry mortar even when unpressurized filling, without the injection medium runs out of the construction hole.

The DE 42 30 547 A1 describes an injection packer for boreholes and the like in masonry and other porous media. For this purpose, a particular embodiment of such a packer is given.

The introduction of the impregnating agent is usually carried out by the so-called packer, either each packer is connected to a reservoir containing the impregnating agent, and the impregnating agent seeps into the building part over a relatively long period of time, or a packer is via a pressure hose connected to a device comprising a storage tank with the impregnating agent. The unit is connected to a standard construction site compressor and pressurized with compressed air. The introduction of the impregnating agent is started by opening a stopcock, so that the impinging acted upon by the compressed air impregnating agent passes through the hose to the packer and into the building part. The introduction is terminated by closing the shut-off valve by the operator if, in the estimation of the operator, the structural part is sufficiently soaked at this point. The tube is then separated from the packer and connected to the next packer, usually spaced no more than 15 cm apart. Accordingly, the process repeats for each hole and each packer until the impregnation of the building part is considered completed. Both methods are very time consuming and the success of the impregnation depends very much on the experience and attention of the person entrusted with the implementation.

For the application of a dense coating on the inside of the building wall, it is customary to apply a primer to the cleaned wall, which is freed in particular from loose mortar and plaster residues, and then to apply a leveling layer. One or more layers of a sealing slurry are then applied and finally a restoration plaster. Such coatings have generally proven to be a reliable internal seal and offer the potential for subsequent sealing of the utility rooms at reasonably calculable costs.

A method in which an external sealing of the structure against pressurized water is to be carried out from the inside, describes the DE 10 2004 013 726 A1 , For this purpose, the groundwater level is to be lowered around the building around and injected through the walls of the building through an injection material, such as an acrylic gel, in the immediate vicinity of the building, so that the building is practically sealed from the outside.

The invention is therefore based on the object to provide an improved method for sealing and hydrophobing of porous parts of a building. The invention is further based on the object to provide a device which is advantageously suitable for use in carrying out the method.

This object is achieved according to the invention by a method of the type mentioned at the outset, the method comprising: injecting a pumpable composition into a porous part of a structure, the composition having water displacing or infiltrating properties until the composition is in a predetermined amount in the porous part the structure has penetrated, and subsequently applying a coating on the inside of the parts of the structure, the coating comprising at least one or more layers of a sealing slurry.

As a result, a method for sealing and hydrophobing of porous parts of a structure is created, with a particularly reliable seal even in hairline cracks in the brickwork is possible. Due to the water-displacing or infiltrating properties of the composition, a gradual drying of the masonry by Abdiffusion of the water from the wall can take place. By providing the coating with at least one or more layers of a sealing slurry on the inside of the parts of the structure is also a lesser accumulation of condensation due to the improved insulation effect of the outer wall compared to the conventional inner seal achievable and a lower heat loss to the surrounding soil. It can thus be saved heating energy.

It proves to be very advantageous if the composition does not contain more than 50% by weight of water, preferably not more than 5% by weight, particularly preferably substantially anhydrous. As a result, a particularly good displacement or infiltration of water in porous parts of a structure for drying it is possible.

Composition is advantageously substantially free of silicone oil. Rather, the composition advantageously comprises a solution of at least one synthetic resin in a solvent which is liquid at room temperature, the solvent having a higher vapor pressure than water. This proves to be particularly advantageous in water displacement and drying of masonry. The solvent may advantageously be an organic solvent, in particular an alcohol, in particular selected from the group consisting of methanol, ethanol and isopropanol or mixtures of two or more thereof.

The composition may further comprise a suspension containing particles of at least one synthetic resin in a liquid. Here, the liquid phase may have a higher vapor pressure than water. This proves to be particularly advantageous in water displacement and drying of masonry. The liquid phase may comprise an alcohol, in particular selected from the group consisting of methanol, ethanol and isopropanol, or mixtures of two or more thereof. The synthetic resin can advantageously be deposited by evaporation of the liquid phase on the walls of pores or capillaries in the porous building material and form a non-water-wettable film. The film can narrow the capillary in the porous building material only so far that capillary transport of water is prevented, but water vapor can pass through.

It also proves to be advantageous if the synthetic resin reacts with the building material to form a hydrophobic monolayer on the walls of the pores of the building material. As a result, a protective jacket against ingress of water on the building material is already formed by applying the synthetic resin.

It proves to be further advantageous if the pressing in of the composition takes place over a section of the part of the building that is covered on its outside by soil plus a region arranged vertically above it, the area having a height in the vertical direction of at least 20 cm, preferably at least 30 cm, more preferably at least 45 cm. The coating may be applied over a portion of the part of the structure covered on its outside by soil plus a region arranged vertically above it, the area having a height in the vertical direction of at least 20 cm, preferably at least 30 cm, particularly preferably at least 45 cm. In this case, the area exposed to moisture as the first area can thus be treated and thus dried and rendered hydrophobic over time.

Advantageously, the injection of a pumpable composition in a porous part of a structure by holes, which are introduced into the porous part of the structure. The holes may be at least 20 cm apart, preferably at least about 25 cm apart. In this way, on the one hand a direct introduction of the composition in the porous part of a building, in particular a masonry, possible, on the other hand, such a distribution of holes that the composition can be optimally distributed in the porous part.

It proves to be further advantageous if the step of applying a coating on the inside of the parts of the building comprises the application of an adhesion promoter and subsequently the application of a leveling layer before the application of one or more layers of a sealing slurry. As a result, a particularly good hold of the coating on the surface of the building parts is possible. The step of applying a coating on the inside of the parts of the structure may also include the application of two layers of two different sealing slurries. Advantageously, the layers of sealing slurries are tight against pending water. With the provision of two different sealing slurries, a particularly good adaptation to the respective application can take place.

The step of applying a coating on the inside of the parts of the structure may advantageously further comprise applying a sprayed plaster and a plaster after applying one or more layers of a sealing slurry. In this way, an optimal protection of the building parts can be created.

The object is further achieved by a device for injecting a pumpable composition into a porous part of a structure, in particular for use in a method for sealing and hydrophobicizing porous parts of a building, the method comprising: injecting a pumpable composition into a porous part of a structure A structure, wherein the composition has water displacing or infiltrating properties until the composition has penetrated the porous part of the structure in a predetermined amount, the device comprising a plurality of containers for receiving the pumpable composition, and each of the containers having a separate one or more Having multiple injection packers connectable outlet. Further developments of the invention are defined in the dependent claims.

By means of the arrangement according to the invention, it is now possible to simultaneously feed in each case a predetermined quantity of the composition into several holes inject, so that despite a different hydraulic resistance of the building material surrounding a respective injection packer this leads to a sufficiently uniform impregnation of the building material.

Particularly suitably, the device comprises four to eight containers for receiving the pumpable composition. As a result, such a device is still sufficiently compact to be worn by a person on a construction site or e.g. be handled in existing basements, while shortening the time required for the introduction of the composition in the building part.

It has been found to be particularly expedient that each container for accommodating the pumpable composition has a capacity of up to 2.5 l (liters), preferably 0.5 l to 1.5 l, more preferably 0.7 l to 1 l , Such a filling results in a sufficient impregnation in a typical basement wall masonry of about 36 cm thickness.

For the operation of such a device, it is advantageous if each container for receiving the pumpable composition has a wall which has a transparent or translucent section for visual fill level control over at least the major part of the container height. On the one hand, the progress of the press-fitting process can be easily read off, on the other hand separate fill level indicators, such as riser tubes, are not required and thus the disadvantages of such devices as setting or curing of the composition within such tubes can be avoided.

Sufficiently precise and, on the other hand, particularly clear is when the visual fill level or translucency sections are / are scaled, the scaling preferably having markings at intervals of 50 ml, 100 ml and / or 250 ml.

It is particularly advantageous if each container for receiving the pumpable composition above a predetermined Betriebsfüllhöhe a Having head volume and the head volumes of the container connected or integrally formed and the device has at least one compressed gas connection for the constant or intermittent compressed gas supply of the head volumes during the implementation of the method. Thereby, the device can be operated with a single energy source, as it is usually encountered on construction sites or easy to provide, such as a commercial site compressor. The use of a compressed gas also has the advantage that the type of gas can optionally be adapted to the composition to be injected, for example an inert gas with a particularly reactive composition. By the head volume and a certain accumulator is realized, so that even interruptions of the compressed gas supply does not lead directly to the interruption of the press-fitting.

Advantageously, each container for receiving the pumpable composition has an outlet with a closable shut-off element at its lower end for substantially complete emptying. Thereby, unnecessary power consumption by e.g. Compressed air loss can be avoided, also an undesired injection of compressed air or another blowing agent used in the device can be prevented in the structural part. Finally, it is also possible, if necessary, to use only one or some of the containers of the device at the same time.

A compact design of the device and thus easier handling on the construction site, especially in old buildings, can be obtained if the shut-off comprises a distributor housing and at least two connectable with a single injection packer shut-off valve with adjustable flow rate limiter.

Advantageously, the apparatus includes front and rear ends, and a wheel set closer to the rear end and at least one support leg closer to the front end, and further at least one handle at or near the front end. As a result, a simple method and parking, thus handling the device on a construction site or at the application site is possible.

It proves to be further advantageous when each container is designed as a working space of a cylinder which is delimited by a piston, wherein the piston for discharging the pumpable composition can be displaced through the outlet from a first operating position remote from the outlet into a second operating position close to the outlet is. By forming the container as a working space of a cylinder space-saving design is possible because there is no additional space for the container.

In order to allow easy handling and exact metering, the piston can be driven by an electric motor and a gear assembly from the first to the second operating position, wherein for determining the discharged volume of the composition means for direct or indirect displacement measurement between the first operating position and a current position of the piston covered distance is provided.

Advantageously, alternatively, the piston may be formed as a separating piston, which separates the working space of the cylinder from a drive space, and the drive space to be filled with a hydraulic fluid, wherein the separating piston can be brought from the first to the second operating position by pumping hydraulic fluid into the drive space, said for determining the discharged volume of the composition, a device is provided for measuring the hydraulic fluid pumped between the first operating position and a current position of the piston in the drive space. This, in turn, an exact dosage of the composition is possible again.

Advantageously, a control device is provided, which is connected to a device for determining the discharged volume or integrally formed, the drive of the piston or the pumping of the hydraulic fluid interrupts as soon as the discharged volume corresponds to the predetermined amount of pumpable composition. Thus, the dosage of composition can be predetermined precisely, with an immediate interruption of the promotion of the composition is possible by engaging in the drive of the piston or the pumping of the hydraulic fluid.

Alternatively, a quantity limitation can be carried out by in each case connectable with a single injection packer shut-off valves with adjustable flow rate limiter.

It can also be provided a pressure measuring device for measuring the pressure in each working space and the control device connected to the pressure measuring means for controlling the electric motor or a pump for the hydraulic fluid such that a predetermined pressure, preferably not more than 10 bar, preferably not more than 8 bar, not or not substantially exceeded in each working space. As a result, when the pressure is exceeded, the electric motor or the pump can be switched off immediately in order to avoid an otherwise possibly occurring danger due to excessive pressure. The pressing of the composition can thus be carried out at a flow rate of 50 ml / min to 100 ml / min, preferably at a pressure of not more than 10 bar, more preferably not more than 8 bar.

The control device can be connected or assembled with a communication device, preferably a device of the mobile radio network or a short-range data radio device or an operational radio device, for transmitting an information signal as soon as the drive of a piston or the pumping of the hydraulic fluid is interrupted and / or a control of the electric motor or a Pump for the hydraulic fluid to limit the pressure is done. Thus, a rapid notification of an operator in case of interruption of the pump-in process or pressure exceeded is possible, so that he can immediately take appropriate further action.

Fig. 1

eine Seitenansicht einer Ausführungsform einer erfindungsgemäßen Vorrichtung zum Einpressen einer pumpfähigen Zusammensetzung in ein poröses Teil eines Bauwerks,

Fig. 2

eine Draufsicht auf die Vorrichtung gemäß Fig. 1,

Fig. 3

eine gegenüber der Ansicht in Fig. 1 um 90° versetzte Seitenansicht der Vorrichtung gemäß Fig. 1,

Fig. 4

eine Detailansicht als Seitenansicht eines Behälters in der Vorrichtung gemäß Fig. 1,

Fig. 5

eine Draufsicht auf den Behälter gemäß Fig. 4,

Fig. 6

eine Querschnittsansicht einer Außenwand eines Gebäudes mit erfindungsgemäßer Abdichtung,

Fig. 7

eine perspektivische Ansicht einer erfindungsgemäß abgedichteten Bauwerkswandung,

Fig. 8

eine Teil-Seitenansicht einer weiteren erfindungsgemäßen Ausführungsform der Vorrichtung,

Fig. 9

eine Teil-Draufsicht auf die Vorrichtung gemäß Fig. 8, und

Fig. 10

eine Ansicht eines Verteilergehäuses mit zwei Absperrventilen der Vorrichtung gemäß Figur 8.

The invention will be explained in more detail below with reference to exemplary embodiments illustrated in the drawings. Show it:

Fig. 1

a side view of an embodiment of an inventive device for injecting a pumpable composition in a porous part of a building,

Fig. 2

a plan view of the device according to Fig. 1 .

Fig. 3

one opposite the view in Fig. 1 90 ° offset side view of the device according to Fig. 1 .

Fig. 4

a detail view as a side view of a container in the device according to Fig. 1 .

Fig. 5

a plan view of the container according to Fig. 4 .

Fig. 6

a cross-sectional view of an outer wall of a building with inventive seal,

Fig. 7

a perspective view of an inventive sealed building wall,

Fig. 8

a partial side view of another embodiment of the device according to the invention,

Fig. 9

a partial top view of the device according to Fig. 8 , and

Fig. 10

a view of a distributor housing with two shut-off valves of the device according to FIG. 8 ,

Fig. 1 shows a side view of an apparatus 1 for injecting a pumpable composition in a porous part of a building. The device comprises eight containers 10, 11, 12, 13, 14, 15, 16, 17 for receiving the pumpable composition. Each of the containers has at its lower end to a respective outlet 18 which can be opened and closed via a stopcock 19. At the outlet, an injection packer 21 can be connected, the side view according to Fig. 3 a pressure hose 20 leading to the injection packer 21, can be removed. The injection packer 21 is in Fig. 3 merely hinted.

The apparatus 1 further comprises, over all containers, a cavity 30, which can serve as a pressure chamber, to deliver the pumpable compositions from the containers via an in-mold Fig. 1 drive out pistons not shown. Container and cavity essentially form the device. Further, in the cavity 30, of course, also engage a gear assembly to the piston to move from a first to a second operating position via an electric motor in order to expel the compositions from the containers. In particular, the piston can also be designed as a so-called. Separating piston, wherein the container is designed as a working space of the cylinder is separated from the drive space for the piston. In the cavity, a hydraulic fluid can be filled, so that over this drive space in the cavity 30, a movement of the piston for expelling the composition provided in the containers is possible.

Like that FIGS. 1 to 3 can be further removed, the device 1 has a corresponding port 31 for a compressor to provide the pressure for the expulsion of the composition from the containers. In order to enable shutdown of the compressor at a detected excessive pressure within the cavity 30, a pressure relief valve 32 is further provided in the region of the connection for the compressor. Furthermore, a filling nozzle 33 is provided for filling the containers 10-17 of the device 1. To avoid overfilling the device, an overflow nozzle 34 is arranged parallel to the containers 10-17 on the device. A pressure measuring device 35, which is provided on the upper side of the device 1, serves to measure the pressure in each working space, ie each container. The pressure measuring device 35 can be connected to a control device in order to be able to control an electric motor or a pump for a hydraulic fluid, which serves for the discharge of the composition from the containers, and in this case by the permanent pressure measurement exceeding a predetermined maximum pressure of, for example bar or 8 bar to avoid.

In the FIGS. 2, 3 and 9 For the sake of clarity, some components are not shown on the upper side of the device, eg handle 52, connection 31 for a compressor, overpressure valve 32, as well as the overflow connection 34.

For determining the discharged volume of the composition from the individual containers, one in the FIGS. 1 to 3 not shown measuring device for determining the first operating position and the straight current operating position of the piston, which expels the composition from the containers, be provided so that from this the discharged amount of composition can be determined.

In order to be able to carry out a visual check with regard to the residual amount of composition in the individual containers, that is to say with respect to consumption, a viewing window 40 is provided on the containers, as in FIGS 4 and 5 shown. The viewing window is designed as a translucent section of the container wall 42. In the container wall 42, a scaling 41 is provided, here in 250 ml intervals, so that a consumption control is easily possible. For example, a container can have a capacity of up to 2.5 l, if necessary also twice as much, if two injection packers 21 are to be fed from the container so that a refill requirement for the viewer can be seen in good time before the container is completely emptied.

In particular Fig. 4 can be seen, the container 10 runs conically in the lowermost region, so has a corresponding recess to allow a complete emptying of the container. In principle, it is also possible to provide the container with a flat or bulbous bottom, if desired.

Like that FIGS. 1 to 3 Furthermore, the device 1 has a wheel set 50 at its one (rear) end 53 and a support foot 51 at its other (front) end 54. Furthermore, a handle 52 is provided on the upper side of the device 1. The device can thus, as in Fig. 1 and 3 shown to be parked on a ground. Furthermore, the one-sided lifting of the device and roles of this with the help of the wheelset and a simple transport to another location possible.

Fig. 6 shows a cross-sectional view of an outer wall 60 of a building, not further shown. The outer wall is provided with nine obliquely arranged holes or boreholes 61. In the holes a water displacing or infiltrating composition was pressed, which has already partially distributed in the porous material of the outer wall. This is indicated by the penetration areas 62. By capillary action, the composition distributes itself further and further into the porous material of the outer wall 60. The areas 62 already penetrated by the composition overlap one another, as in FIG Fig. 6 can be removed, and form here corresponding to a surface barrier against moisture penetrating or displace them from the wall 60th

Fig. 7 shows a perspective view of the outer wall 60 with the numerous boreholes 61: The distance between the individual boreholes to each other, for example, be 25 cm. This provides sufficient clearance to permit very good distribution and penetration of the porous portion of the outer wall 60 with the composition being pressed into the boreholes by the device 1.

In the right part of the Fig. 1 Further layers are applied to the outer wall 60 on the inner surface 63. Directly on the brick layer of the outer wall 60, so the inner surface 63, an adhesive layer 64 is applied. Above this there is a leveling layer for leveling. In the area of the bottom plate 80, a sealing groove 66 is arranged.

Over the compensating layer 65, a first sealing layer 67 and above this a second sealing layer 68 is arranged. These sealing layers contain sealing slurries, wherein in principle more than these two sealing layers can be provided. The two layers of sealing layers or sealing slurries can consist of the same material or of different materials.

On the second sealing layer 68, a Spritzbewurf 69 is provided. This is applied in particular to the still moist intentional layer as so-called. On this is appropriate Fig. 7 a restoration 70 arranged. Spritzbewurf and Sanierputz save each, how Fig. 7 can be removed, the region of the sealing groove 66, so do not protrude to the bottom plate 80 zoom.

The composition contained in the device and pressed into the boreholes 61 of the outer wall 60 may comprise a suspension of particles of at least one synthetic resin in a liquid, the liquid phase being, for example, an alcohol such as methanol, ethanol and isopropanol or a mixture of two or three contains of these. The resin is then deposited after the composition has been pressed into the wells, with evaporation of the liquid phase in the wall or within its pores or capillaries, where it forms a non-water-wettable film. As a result, a Kapillartransport of water is prevented due to the narrowing of the capillaries. However, water vapor can still pass through the masonry. In particular, the synthetic resin forms a hydrophobizing monolayer within the pores of the masonry of the outer wall 60.

In the FIGS. 8 to 10 a further embodiment of the device according to the invention is shown. The device essentially corresponds to the FIG. 1 , However, the shut-off element 19 comprises a distributor housing 25 and two (or more) connectable with a single injection packer 21 check valves 26 with adjustable flow rate limiter. This allows, for example, two injection packers to be fed simultaneously from one of the containers 10-17. The distributor housing 25 in each case comprises a connection 27 for a pressure hose 20. Nevertheless, via the shut-off valves 26, the predetermined quantity of the composition to be dispensed via a single injection packer 21 can be maintained via the corresponding setting of the flow rate limiter for each of the shut-off valves, which after detecting the predetermined quantity Valve closes. By this embodiment, it is possible to keep the overall length of the device based on the number of simultaneously to be supplied injection packer 21, which in particular improves the maneuverability of a device according to the invention, for example in old building basements or during transport over narrow stairs. In the case of correspondingly larger containers 10-17, it is alternatively possible to reduce the overall time required for a refurbishment object.

In addition to the embodiments of a device for injecting a pumpable described in the foregoing and shown in the figures Numerous others may be formed in a porous part of a structure, as well as a method for sealing and hydrophobicizing porous parts of a structure, each comprising a plurality of containers for receiving the pumpable composition, and each container having a separate outlet for connection to an injection packer and wherein the composition is injected into the porous part of a building in a predetermined amount, the composition having water displacing or undercutting properties.

LIST OF REFERENCE NUMBERS

1

contraption

10

container

11

container

12

container

13

container

14

container

15

container

16

container

17

container

18

outlet

19

stopcock

20

pressure hose

21

injection packers

25

distributor housing

26

Shut-off valve with adjustable flow limiter

27

connection

30

cavity

31

Connection for compressor

32

Pressure relief valve

33

filling union

34

Overflow pipe

35

Pressure measuring device

40

window

41

scaling

42

container

50

wheelset

51

Support foot

52

handle

53

rear end

54

front end

60

outer wall

61

well

62

penetration

63

palm

64

Bonding layer

65

leveling layer

66

tight throat

67

first sealing layer

68

second sealing layer

69

Spritzbewurf

70

Restoration

80

baseplate

Claims (21)

Method for sealing and hydrophobing porous parts (60) of a building, the method comprising: Injecting a pumpable composition into a porous part (60) of a building, wherein the composition is water displacing or has infiltrating properties until the composition has penetrated in a predetermined amount into the porous part (60) of the building, and subsequently applying a coating on the inside (63) of the parts (60) of the structure, wherein the coating comprises at least one or more layers of a sealing slurry (67,68). The method of claim 1, wherein the composition contains not more than 50% by weight of water, preferably not more than 5% by weight, more preferably substantially anhydrous, and / or the composition is substantially free of silicone oil. Method according to one of the preceding claims, wherein the composition comprises a suspension containing particles of at least one synthetic resin in a liquid, preferably, characterized in that the liquid phase has a higher vapor pressure than water, particularly preferred that the liquid phase comprises an alcohol, in particular selected from the group consisting of methanol, ethanol and isopropanol, or mixtures of two or more thereof. The method of claim 3, wherein the resin is deposited by evaporation of the liquid phase on the walls of pores or capillaries in the porous building material and forms a non-water-wettable film. Method according to one of claims 1 or 2,
wherein the composition comprises a solution of at least one synthetic resin in a solvent which is liquid at room temperature, the solvent having a higher vapor pressure than water, in particular characterized in that the solvent is an organic solvent, in particular an alcohol, in particular selected from the group consisting of Methanol, ethanol and isopropanol or mixtures of two or more thereof. A method according to claim 4, characterized in that the film narrows the capillary in the porous building material only so far that a capillary transport of water is prevented, but water vapor can pass through. Method according to one of claims 3 or 5, characterized in that the synthetic resin reacts with the building material to form a hydrophobizing monolayer on the walls of the pores of the building material. Method according to one of the preceding claims, wherein the pressing of the composition takes place over a portion of the part of the structure, which is covered on its outside by soil plus a vertically arranged above area, wherein the region has a height in the vertical direction of at least 20 cm, preferably at least 30 cm, more preferably at least 45 cm, preferably wherein the application of the coating over a portion of the part of the structure, which is covered on its outside by soil plus a vertically disposed above the area, said area a height in the vertical direction of at least 20 cm, preferably at least 30 cm, more preferably at least 45 cm. Method according to one of the preceding claims, wherein the injection of a pumpable composition in a porous part (60) of a building by holes (61) which are incorporated in the porous part (60) of the building, preferably, wherein the holes at least spaced apart by 20 cm, preferably at least about 25 cm. Method according to one of the preceding claims, wherein the injection of the composition with a volume flow of 50 ml / min to 100 ml / min is preferably carried out at a pressure of not more than 10 bar, more preferably not more than 8 bar. Method according to one of the preceding claims, characterized in that the step of applying a coating on the inside (63) of the parts of the building, the application of a bonding agent (64) and subsequently applying a leveling layer (65) before the application of one or more layers a sealing slurry (67,68). Method according to one of the preceding claims, characterized in that the step of applying a coating on the inside (63) of the parts of the structure comprises the application of two layers of two different sealing slurries (67, 68), preferably that the layers of the sealing slurries (63) 67,68) are tight against upcoming water. Method according to one of the preceding claims, characterized in that the step of applying a coating on the inside (63) of the parts of the building comprises applying a sprayed plaster (69) and a plaster (70) after application of one or more layers of a sealing slurry ( 67, 68). Apparatus (1) for injecting a pumpable composition into a porous part (60) of a structure, in particular for use in a method of sealing and hydrophobicizing porous parts (60) of a building according to any one of the preceding claims, which method comprises injecting a pumpable one Composition in a porous part (60) of a building, wherein the composition Has water-displacing or infiltrating properties until the composition has penetrated the porous part (60) of the building in a predetermined amount, the apparatus (1) comprising a plurality of tanks (10, 11, 12, 13, 14, 15, 16) 17) for receiving the pumpable composition, and each of the containers (10, 11, 12, 13, 14, 15, 16, 17) has a separate outlet (18) connectable to one or more injection packers (21). Device (1) according to claim 14, characterized in that the device (1) comprises four to eight containers (10, 11, 12, 13, 14, 15, 16, 17) for receiving the pumpable composition, and / or that each Container (10,11,12,13,14,15,16,17) for receiving the pumpable composition has a capacity of up to 2.5 l, preferably 0.5 l to 1.5 l, more preferably around 0, 7 l to 1 l. Device (1) according to one of claims 14 or 15, characterized in that each container (10,11,12,13,14,15,16,17) for receiving the pumpable composition has a wall (42) which at least over most of the container height has a transparent or translucent visual level control section (40), preferably that the visual level control translucent sections (40) are / are provided with a scale (41), the scale (41) preferably Has markings at intervals of 50 ml, 100 ml and / or 250 ml. Device (1) according to one of claims 14 to 16, characterized in that each container (10,11,12,13,14,15,16,17) for receiving the pumpable composition above a predetermined operating level has a head volume and the head volumes the container (10,11,12,13,14,15,16,17) are connected or integrally formed and the device (1) at least one compressed gas connection (31) to the permanent or having intermittent compressed gas supply of the head volumes (30) during the implementation of the method. Device (1) according to one of claims 14 to 16, characterized in that each container (10,11,12,13,14,15,16,17) is designed as a working space of a cylinder which is delimited by a piston, wherein the piston for discharging the pumpable composition through the outlet (18) is displaceable from a first operating position remote from the outlet to a second operating position close to the outlet, preferably, that the piston is driven by an electric motor and a gear arrangement from the first to the second operating position in which, for determining the discharged volume of the composition, a device is provided for direct or indirect displacement measurement of the distance traveled between the first operating position and a current position of the piston, or in that the piston is designed as a separating piston which controls the working space of the cylinder from a drive space separates and the drive space is filled with a hydraulic fluid, the Tre nnkolben from the first to the second operating position can be brought by pumping hydraulic fluid into the drive chamber, wherein for determining the discharged volume of the composition means for measuring the pumped between the first operating position and a current position of the piston in the drive chamber hydraulic fluid is provided. Device (1) according to claim 18, characterized by a control device which is connected to a means for determining the discharged volume or integrally formed, the drive of the piston or the pumping of the hydraulic fluid interrupts as soon as the discharged volume of the predetermined amount of pumpable composition and preferably characterized in that further comprises a pressure measuring device (35) is provided for measuring the pressure in each working chamber and the control means is connected to the pressure measuring means for Control of the electric motor or a pump for the hydraulic fluid such that a predetermined pressure, preferably not more than 10 bar, preferably not more than 8 bar, is not exceeded in each working space, further preferred that the control device with a communication device, preferably one Device of the mobile radio network or a short-range data radio device or an operating radio device, connected or assembled to transmit an information signal as soon as the drive of a piston or the pumping of the hydraulic fluid is interrupted and / or a control of the electric motor or a pump for the hydraulic fluid to limit the pressure. Device (1) according to one of claims 14 to 19, characterized in that each container (10, 11, 12, 13, 14, 15, 16, 17) for receiving the pumpable composition has an outlet (18) with a closable shut-off element (10). 19) at its lower end for substantially complete emptying, preferably further characterized in that the shut-off element (19) comprises a distributor housing (25) and at least two each with a single injection packer (21) connectable shut-off valves (26) with adjustable flow rate limiter. Device (1) according to one of claims 14 to 20, characterized in that the device (1) has a front and a rear end (53, 54) and a wheel set (50) closer to the rear end (53) and at least one Support leg (51) closer to the front end (54), and further at least one handle (52) at or near the front end (54).

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